<s>
Gpg4win	B-Application
is	O
an	O
email	O
and	O
file	O
encryption	O
package	O
for	O
most	O
versions	O
of	O
Microsoft	B-Application
Windows	I-Application
and	O
Microsoft	B-Application
Outlook	I-Application
,	O
which	O
utilises	O
the	O
GnuPG	B-Application
framework	O
for	O
symmetric	B-Algorithm
and	O
public-key	B-Application
cryptography	I-Application
,	O
such	O
as	O
data	O
encryption	O
,	O
digital	O
signatures	O
,	O
hash	B-Algorithm
calculations	I-Algorithm
etc	O
.	O
</s>
<s>
The	O
original	O
creation	O
of	O
Gpg4win	B-Application
was	O
initiated	O
in	O
2005	O
and	O
funded	O
by	O
Germany	O
's	O
Federal	O
Office	O
for	O
Information	O
Security	O
(	O
BSI	O
)	O
in	O
2006	O
,	O
resulting	O
in	O
the	O
release	O
of	O
Gpg4win	B-Application
1.0.0	O
on	O
6	O
April	O
2006	O
;	O
however	O
Gpg4win	B-Application
and	O
all	O
included	O
tools	O
are	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
software	I-Application
,	O
and	O
it	O
is	O
typically	O
the	O
non-proprietary	O
option	O
for	O
privacy	O
recommended	O
to	O
Windows	O
users	O
.	O
</s>
<s>
As	O
Gpg4win	B-Application
v1	O
was	O
a	O
much	O
overhauled	O
derivate	O
of	O
GnuPP	O
,	O
both	O
were	O
using	O
GnuPG	B-Application
v1	O
for	O
cryptographic	O
operations	O
and	O
thus	O
only	O
supported	O
OpenPGP	O
as	O
cryptography	O
standard	O
.	O
</s>
<s>
Hence	O
in	O
2007	O
the	O
development	O
of	O
a	O
fundamentally	O
enhanced	O
version	O
was	O
started	O
,	O
also	O
with	O
support	O
from	O
the	O
German	O
BSI	O
(	O
Federal	O
Office	O
for	O
Information	O
Security	O
)	O
;	O
this	O
effort	O
culminated	O
in	O
the	O
release	O
of	O
Gpg4win	B-Application
2.0.0	O
on	O
7	O
August	O
2009	O
after	O
a	O
protracted	O
beta	O
testing	O
phase	O
,	O
which	O
was	O
based	O
on	O
GnuPG	B-Application
2.0	O
,	O
included	O
S/MIME	O
support	O
,	O
Kleopatra	O
as	O
a	O
new	O
certificate	O
manager	O
,	O
the	O
Explorer	B-Protocol
plug-in	O
GpgEX	O
for	O
cryptography	O
operations	O
on	O
files	O
,	O
basic	O
support	O
of	O
smart	O
cards	O
,	O
a	O
full	O
set	O
of	O
German	O
dialogue	O
texts	O
in	O
addition	O
to	O
the	O
English	O
ones	O
,	O
new	O
manuals	O
in	O
English	O
and	O
German	O
,	O
plus	O
many	O
other	O
enhancements	O
.	O
</s>
<s>
In	O
contrast	O
to	O
Gpg4win	B-Application
v2	O
,	O
which	O
focused	O
on	O
new	O
features	O
and	O
software	O
components	O
,	O
the	O
development	O
of	O
Gpg4win	B-Application
v3	O
focused	O
on	O
usability	O
,	O
plus	O
consolidation	O
of	O
code	O
and	O
features	O
:	O
This	O
resulted	O
in	O
the	O
release	O
of	O
Gpg4win	B-Application
3.0.0	O
on	O
19	O
September	O
2017	O
with	O
proper	O
support	O
for	O
Elliptic	O
Curve	O
Cryptography	O
(	O
ECC	O
)	O
by	O
utilising	O
GnuPG	B-Application
2.2	O
(	O
instead	O
of	O
2.0	O
)	O
,	O
broadened	O
,	O
stabilised	O
and	O
enhanced	O
smart	O
card	O
support	O
,	O
a	O
fundamentally	O
overhauled	O
Outlook	B-Application
plug-in	O
GpgOL	O
for	O
Outlook	B-Application
2010	O
and	O
newer	O
,	O
support	O
of	O
64-bit	O
versions	O
of	O
Outlook	B-Application
2010	O
and	O
newer	O
,	O
supporting	O
dialogues	O
in	O
all	O
languages	O
which	O
KDE	O
supports	O
etc	O
.	O
</s>
<s>
It	O
is	O
also	O
distributed	O
as	O
GnuPG	B-Application
VS-Desktop	O
with	O
commercial	O
support	O
and	O
approval	O
for	O
handling	O
NATO	O
RESTRICTED	O
,	O
RESTREINT	O
UE/EU	O
RESTRICTED	O
and	O
German	O
VS-NfD	O
documents	O
,	O
which	O
in	O
turn	O
has	O
become	O
the	O
major	O
source	O
of	O
revenue	O
for	O
maintaining	O
and	O
further	O
developing	O
the	O
GnuPG	B-Application
framework	O
and	O
Gpg4win	B-Application
.	O
</s>
<s>
Gpg4win	B-Application
4.0.0	O
,	O
released	O
on	O
21	O
December	O
2021	O
,	O
switched	O
to	O
using	O
GnuPG	B-Application
2.3	O
(	O
from	O
2.2	O
)	O
and	O
continued	O
to	O
refine	O
and	O
enhance	O
the	O
feature	O
set	O
of	O
Gpg4win	B-Application
v3	O
.	O
</s>
